A Design of Parameters with Supercritical Carbon Dioxide Brayton Cycle for CiADS

Yichuan He,Aihua Dong,Yang Liu,Min Xie

doi:10.1155/2018/3245604

Abstract

Recompression supercritical carbon dioxide (SCO2) Brayton Cycle for the Chinese Initiative Accelerator Driven System (CiADS) is taken into account, and flexible thermodynamic modeling method is presented. The influences of the key parameters on thermodynamic properties of SCO2 Brayton Cycle are discussed and the comparative analyses on genetic algorithm and pattern search algorithm are conducted. It is shown that the cycle parameters such as turbine inlet temperature, pressure ratio, outlet temperature at the hot end of condenser, and terminal temperature difference of regenerator 1 and regenerator 2 have significant effects on the cycle thermal efficiency. The calculation results indicate that pattern search algorithm has better optimization performance and quicker calculating speed than genetic algorithm. The result of optimization of the parameters for CiADS with supercritical carbon dioxide Brayton Cycle is 35.97%. Compared with other nuclear power plants of SCO2 Brayton Cycle, CiADS with SCO2 Brayton Cycle does not have the best thermal efficiency, but the thermal efficiency can be improved with the reactor outlet temperature increases.

Highlights

The accelerator driven subcritical reactor system (ADS) is a new kind of nuclear reactor which has been regarded as the most promising approach to burn minor actinide waste products with inherent safety features
In recent years there are some successful developments concerning this concept, which is mainly conducted at the research institutions like Massachusetts Institute of Technology (MIT), Idaho National Laboratory (INL), Sandia National Laboratories (SNL), Argonne National Laboratory (ANL), Tokyo Institute of Technology (TIT), South Korea Atomic Energy Research Institute (KAERI), Czech Technical University (CTU), Nuclear Power Institute of China (NPIC), Xi’an Jiao tong University, and so on [10,11,12,13,14,15,16,17,18,19,20,21]
It can be observed that the turbine inlet temperature has a significant influence on cycle thermodynamic performance, and there are optimal pressure ratios at different turbine inlet temperature

Summary

Introduction

The accelerator driven subcritical reactor system (ADS) is a new kind of nuclear reactor which has been regarded as the most promising approach to burn minor actinide waste products with inherent safety features. The Rankine cycle is used as the energy conversion system in most of the nuclear power plants [3, 4]. The high temperature gas cooled reactor constructed in china used helium gas as the working substance [5]. The low density of helium leads to high power consumption of the helium compressor, which reduces the net efficiency of the reactor. It is necessary for the helium cooled reactor core to have a high outlet temperature (about 800∼ 1000∘C) to ensure its economic efficiency [6]

Objectives

Methods

Results

Conclusion